Good Catch there! At first I thought 2) is saying that 0 is in the middle of s and t.
agree with A
Just a suggestion, whenever possible try to negate one statement in the other statement. This can give you a good counter example for the other statement.
E.g Is 7! divisible by x?
2).x is integer
In this scenario make that in case of statement 1 x is some fractional value (negation of statement 2). This way you can get a -ve case very easily.